Adenostoma fasciculatum Hook. & Arn.
Chamise is native to California and northern Baja California.
Identification: This common densely branched woody shrub reaches as much as 13' (4 m) in height. Bark is gray-brown in color. The leaves are small, ⅛-⅜" (4-10 mm) long × ¹/₃₂" (1 mm) wide, dark- or yellow-green, shiny, attached in fascicles, or tight clusters. They are highly flammable, owing to the presence of oils. (Despite this flammability, chamise recovers quickly after fires because its crown regenerates from its base.) Flowers are small, white, with 5 petals, in cone-shaped groups up to 1½-4½" (4-12 cm) long.
Adenostoma fasciculatum on Wikipedia
Adenostoma fasciculatum at the Lady Bird Johnson Wildflower Center
Adenostoma fasciculatum at the Anza-Borrego Desert Natural History Association
Adenostoma fasciculatum on the USDA Forest Service's Fire Effects Information Database
Adenostoma fasciculatum on Plants for a Future, a resource and information centre for edible and otherwise useful plants
Adenostoma fasciculatum from the Jepson Manual
Adenostoma fasciculatum description by Thomas H. Kent, last updated 16 Aug 2013.